Pattern-plate for reproducing designs and the process of producing the same.



J. JAGOBSON.

PATTERN PLATE FOR REPRODUGING DESIGNS AND THE rnoonss 0F PRODUCING THE SAME.

APPLICATION FILED MAY 18, 1908.

Patented June; .29, 1909.

UNITED STATES PATENT OFFICE.

JOHN JACOBSON, OF NEW YORK, N. Y., ASSIGNOR TO WEAVE-PRINT COMPANY, A CORPORA- TION OF NEW YORK.

PATTERN-PLATE FOR REPROD'U'CING DESIGNS AND THE PROCESS OF PRODUCING THE SAME.

To all whom it may concern:

Be it known that I, JOHN JACOBSON, a citizen of the United States, residing in New York, in the county of New York and State of New York, have invented an Improvement in Pattern-Plates and Processes of Producing Same, of Which the following description, in connection with the accom anying drawings, is a specification, like etters on the drawings representing like parts.

The present invention relates to a pattern plate for reproducing designs and the process of producing the same, and is embodied in a transparent late having its surface provided with regular y-spaced depressions or hollows, so that when placed over a design, pigment can be applied to the surface and prevented from spreading by the configuration of the surface, so that the outline of the design underneath can be accurately traced without special care or skill.

Such pattern plates may be used in tracing different parts of the design shown in different colors, and from prepared pattern plates photographic plates may be made for the purpose of obtaining printing surfaces corresponding to the different parts of the designs. A process in connection with which such pattern plates are used is set forth and described in another application filed by me May 18, 1908, Serial No. 433,475.

The invention is further embodied in the producing of such a late, and consists in a series of steps where y the plate is finally formed of gelatin with raised and depressed portions.

In carrying out the process a pattern ruled with black lines crossing each other is employed and by printing, or otherwise, a photogra hic negative is made from said pattern an a positive then made from the negative. This positive is then used in exposing a sensitized bichromatized gelatin plate to the light, which causes that part of the gelatin plate which corresponds to the spaces between the lines to become oxidized, so that by immersing the gelatin plate in water that portion of the surface which corresponds to the lines Specification of Letters Patent.

Application filed May 18, 1908.

Patented June 29, 1909.

Serial No. 433,476.

will swell. When such a plate is laced over a design and pigment applied t ercto, the pigment will be held in the depressions with no tendency to fiow, so that the outline of the pattern can be followed with rapidity with the exercise of very slight skill.

Figure 1 represents a pattern used in carrying out the process Fig. 2 represents, in per spective, a positive transparent plate superimposed upon a sensitized gelatin plate; and Fig. 3 is a section, partly in perspective, of the transparent pattern plate complete.

From the pattern plate A (Fig. 1) a negative is taken and developed, and from this negative a positive a is made, as indicated in Fig. 2, and the said positive is superimposed in a printing frame, or otherwise, upon a sonsitized plate I) in which the gelatin is mounted upon a transparent base 0, Figs. 2 and 3. T is transparent base may be glass, but I prefer to use thin celluloid, as it is desirable to have the finished pattern plate as thin as possible to prevent refraction when it is placed over the design to be traced. The exposure of the gelatin plate I) through the positive a results in the oxidation of that part of the plate I) which corresponds to the spaces between the lines, so that these parts are rendered insoluble. The plate I) is then immersed in water to cause the gelatin to swell, and after this process is completed the surface of the gelatin plate I) will have a series of regular depressions b separated by the ridges N, as indicated in Fig. 3. The nonoxidized swelled portion of the gelatin has a tendency to resist the pigment which, on the contrary, will settle in the depressions, and in tracing a design it is easy to follow the outline of the design without any tendency of the pigment to spread beyond the desired limit.

Claims.

1. A pattern plate, having a transparent mount and a surface portion of gelatin having regularly spaced depressions of oxidized gelatin separated by raised, non-oxidized portions.

2. The herein described process of producing a pattern plate which consists in mak- Q eaaese ing a trans arent positive from a pattern I name to this specification in the presence of havingb ruled blackdlineis; expiasing a sielniitwo subscribing Witnesses. I tized ichromatize ge atin p ate to 'g-t transmitted through said positive, and then JOHN JACOBSON' 5 treating said gelatin plate with Water to Witnesses:

swell the non-oxidized portions thereof. A. H. MOTLEY, J12,

In testimony whereof, I have signed my AUGUST ZmssER, Jr. 

